Refer to the figure. - The figure shows the changes associated with the overall size of bighorn sheep (top), and the size of their horns (bottom) during the period between 1975 and 2005. In 2005, the sheep had horns that were approximately _______ than the average horn lengths found in 1976.
A) 20 cm shorter B) 26 cm shorter C) 30 cm shorter D) 38 cm longer